In most of Africa, national and targeted subnational immunization campaigns are helping to sharply reduce the number of polio cases.
在非洲多数地方，全国性及锁定特定地区的免疫活动，有助于大幅减少小儿痲痹病例数。
2
Due to gaps in the quality of acute flaccid paralysis (AFP) surveillance at subnational levels, additional undetected WPV circulation cannot be ruled out.
由于国家级以下的急性弛缓性麻痹监测质量存有差距，因此尚不能排除存在未经发现的野生脊灰病毒传播情况。
3
214 geographic markets across Asia Pacific, Latin America, Europe, Middle East, Africa, Developed Economies and subnational data for China, India, Brazil and Russia.